He made a mistake in Step 2 the correct answer is
• collect like terms and move them to the right hand side and change it’s sign
• then add the like terms, after you have to isolate the variable therefore you divide and you get your answer
4x - 4 > 20
4x > 20 + 4
4x > 24
4x/4 > 24/4
x > 6
Hope this helps!